You can use the same IP for all the virtual hosts. You'll need to use the lan IP assigned by DHCP or statically set manually. So your hosts file would read something like:
Then in your virtual hosts section of your apache conf would be something like:
Options Indexes FollowSymLinks MultiViews
allow from all
This assumes a folder structure of:
------flyt (flyt site)
------G-Sun2009 (G-Sun2009 site)
Remember that you'll have to restart apache every time you edit the config file in order to see any changes. Also on Windoze systems you sometimes have to log out and back in (or reboot) to get the changes in your hosts file to work properly.